package com.njwb.day15.service;

import com.njwb.day15.pojo.Student;

import java.util.List;

public interface StudentService {
    int addStudent(Student stu) ;


    int updateStudent(Student stu) ;


    int deleteStudentById(int sid) ;


    Student findStudentById(int sid);

    List<Student> queryAllStudents() ;

}
